This is a fairly typical dubbed Italian sword and sandal epic, though the dubbing is worse than in others I've seen. Expect bad acting, laughable special effects, and busty women. If you like the Hercules movies, some of which are http://www.archive.org/search.php?query=title%3A(hercules)%20AND%20collection%3A(feature_films)"
rel="nofollow">here at IA, you'll like this. In this movie the hero Obro, who looks a bit like Charlton Heston, has an adventure in the Atlantian city of Metropolis ruled by the evil lord Yotar.
The short first act sets up the story, with Obro and his brothers charged with warning Atlantis against using science to pervert the course of nature. Sound familiar? Obro makes it to Metropolis where he is captured, beginning the sluggish second act. It's padded out with Obro being tested three times against various opponents, my favorite being the last where he struggles against beams of light, and two ceremonies. The first ceremony included an impressive number of extras, the second featured a dancer whose costume was made with nylon side panels. The muddled third act has a change of pace, and begins with Obro's escape aided by members of Yotar's court. (He is taken to the cave or lair of the giant to hide. This is the only reference to giant that I noticed. I think the giant of the movie's title refers to Obro.) Obro begins a hit and run offensive against Yotar's men, and gets some action from Yotar's daughter Mecede. He finally battles his way to confront Yotar, and as he is about to stab him with what looked like a metal feather duster, Mecede stops him by running in and shouting "Don't shoot!", after which they are captured. A little later Yotar has a change of heart, freeing them just as Atlantis is destroyed.
I downloaded the 1,000 MB AVI file. It's from a washed out print with bad audio.